Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Absorption of visible radiation in atmosphere containing mixtures of absorbing and nonabsorbing particles

Not Accessible

Your library or personal account may give you access

Abstract

Recent measurements of the single-scattering albedo ω˜0 of tropospheric aerosols indicate the presence of a strongly absorbing material which has tentatively been identified as graphitic carbon (soot). Theoretical calculations, based on several different models of the way in which soot might be mixed with other aerosol materials, show that a minimum of 20% soot by volume is necessary to achieve the observed urban value of ω˜0 = 0.6. Rural values of the order of 0.8 can be accounted for with 1–5% soot by volume. These same values of ω˜0 can be produced by similar amounts of the iron oxide magnetite, which is shown to be virtually indistinguishable from soot by optical measurements performed on bulk samples. Calculations of phase functions for various mixtures of soot also indicate the difficulty of determining aerosol composition by optical scattering techniques. The climatic effects of these absorbing aeorosols are computed using a simple one-layer model, and the results suggest that heating rates in urban pollution layers may be of the order of 4 K/day.

© 1981 Optical Society of America

Full Article  |  PDF Article

Corrections

Thomas P. Ackerman and Owen B. Toon, "Absorption of visible radiation in atmosphere containing mixtures of absorbing and nonabsorbing particles: erratum," Appl. Opt. 21, 758-758 (1982)
https://opg.optica.org/ao/abstract.cfm?uri=ao-21-5-758

More Like This
Optical properties of internally mixed ammonium sulfate and soot particles--a study of individual aerosol particles and ambient aerosol populations

Annette Worringen, Martin Ebert, Thomas Trautmann, Stephan Weinbruch, and Günter Helas
Appl. Opt. 47(21) 3835-3845 (2008)

Light scattering and absorption by soot in the presence of sulfate aerosols

Melina P. Ioannidou, Ioanna I. Bakatsoula, and Dimitris P. Chrissoulidis
Appl. Opt. 39(24) 4205-4213 (2000)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved